Analysis of the Earthquake Early Warning of the Luding M6.8 Earthquake on September 5,2022
On September 5,2022,a M6.8 earthquake struck Luding county,Sichuan province.This paper examines earthquake early warning information generated by two sets of earthquake early warning processing software,EEW and JEEW,deployed within the Sichuan earthquake early warning network.EEW and JEEW issued their initial warning alerts 4.4 seconds and 8.2 seconds after the earthquake,respectively.The magnitude deviations were-1.6 and-0.8,while the epicenter location deviations were 11.2 km and 0.8 km,respectively.Over time and with increased data from additional monitoring stations,the early warning processing results eventu-ally aligned with the findings of the official earthquake catalog.The earthquake early warning information had a blind area radius of 14.7 km.Outside this blind area,regions experiencing intensity level Ⅵ or higher were provided with warning times ranging from 0 to 21 seconds.The effectiveness of disaster mitigation was evident within the operational scope of the early warning system.
Earthquake early warningLuding M6.8 earthquakeEarly warning processing resultsDisaster reduction effect-iveness
万方数据
维普
